DESCRIPTION Of The NAUTRIGON, with Directions for Its Use; an Instrument for Solving Problems in Navigation, Invented by Thomas Hill, D.D. LL.D. Patented February 22, 1876.
Portland: Stephen Berry, Printer. 1876. 1st edition. 24 pp. Illustrated. 8vo. Printed buff paper wrappers, with wrapper title as: "Abridgement of the Nautical Almanac for 1877, Containing a Full Description of the Nautrigon; an Instrument for Solving Problems in Navigation." Now housed in a clear archival mylar sleeve. OCLC locates..... More